<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			var a={
				
			}
			
			
			
			
			
			
			
			let student={
				name:'jack',
				age:12,
				'play':function(){
					alert('玩耍~~~')
				},
				tostring:function(){
					 alert(this.name)
				}
			}
		</script>
	</head>
	<body>
		<button type="button" onclick='student.tostring()' style="height: 30px;"></button>
	</body>
</html>
